如何测试c#传真程序

如何测试我自己的c#程序以发送传真?

namespace FAX
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
        }
        private void button1_Click(object sender, EventArgs e)
        {
            SendFax(textBox1.Text,openFileDialog1.FileName,textBox2.Text,textBox3.Text);

        }
        public void SendFax(string DocumentName, string FileName, string RecipientName, string FaxNumber)
        {
            if (FaxNumber != "")
            {
                int response = 0;
                FAXCOMLib.FaxServer faxServer = new FAXCOMLib.FaxServerClass();
                try
                {
                    faxServer.Connect("");
                }
                catch (Exception e)
                {
                    MessageBox.Show(e.Message);
                }
                FAXCOMLib.FaxDoc faxDoc = (FAXCOMLib.FaxDoc)faxServer.CreateDocument(FileName);
                try
                {
                    faxDoc.FaxNumber = FaxNumber;
                    faxDoc.RecipientName = RecipientName;
                    faxDoc.DisplayName = DocumentName;
                }
                catch (Exception e)
                {
                    MessageBox.Show(e.Message);
                }
                try
                {
                    response = faxDoc.Send();
                }
                catch (Exception e)
                {
                    MessageBox.Show(e.Message);
                }
                try
                {
                    faxServer.Disconnect();
                }
                catch (Exception Ex)
                {
                    MessageBox.Show(Ex.Message);
                }
            }
        }
        private void button2_Click(object sender, EventArgs e)
        {   openFileDialog1.FileName = "";
            openFileDialog1.InitialDirectory = System.Environment.GetFolderPath(Environment.SpecialFolder.Personal);
            openFileDialog1.Filter = " doc file|*.doc";
            openFileDialog1.ShowDialog();
           string Filepath = "";
            Filepath = openFileDialog1.FileName;

        }
    }
}